CN111433391B - Membrane-electrode-gasket composite for alkaline water electrolysis - Google Patents

Membrane-electrode-gasket composite for alkaline water electrolysis Download PDF

Info

Publication number
CN111433391B
CN111433391B CN201880078363.3A CN201880078363A CN111433391B CN 111433391 B CN111433391 B CN 111433391B CN 201880078363 A CN201880078363 A CN 201880078363A CN 111433391 B CN111433391 B CN 111433391B
Authority
CN
China
Prior art keywords
electrode
cathode
anode
membrane
separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201880078363.3A
Other languages
Chinese (zh)
Other versions
CN111433391A (en
Inventor
田中康行
末冈春实
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokuyama Corp
Original Assignee
Tokuyama Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokuyama Corp filed Critical Tokuyama Corp
Publication of CN111433391A publication Critical patent/CN111433391A/en
Application granted granted Critical
Publication of CN111433391B publication Critical patent/CN111433391B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C25B11/031—Porous electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/75—Assemblies comprising two or more cells of the filter-press type having bipolar electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Abstract

A membrane-electrode-gasket composite for alkaline water electrolysis, comprising: a membrane having a 1 st membrane face and a 2 nd membrane face; a 1 st electrode arranged to overlap the 1 st film face; and a gasket having electrical insulation properties and holding the separator and the 1 st electrode together, the gasket including: a 1 st surface which is in contact with the anode side frame; a 2 nd surface contacting the cathode side frame; a slit portion that opens toward the inner peripheral side and that accommodates the entire peripheral edge portion of the separator and the entire peripheral edge portion of the 1 st electrode; a 1 st part and a 2 nd part which are opposed to each other with a slit therebetween; and a connecting portion provided on an outer peripheral side of the slit portion, integrally connecting the 1 st portion and the 2 nd portion, and sealing an outer peripheral end of the slit portion, wherein an entire peripheral edge portion of the separator and an entire peripheral edge portion of the 1 st electrode accommodated in the slit portion are integrally sandwiched between the 1 st portion and the 2 nd portion.

Description

Membrane-electrode-gasket composite for alkaline water electrolysis
Technical Field
The present invention relates to a gasket for an electrolytic cell for alkaline water electrolysis, and more particularly, to a membrane-electrode-gasket composite for alkaline water electrolysis and an alkaline water electrolytic cell having the same.
Background
As a method for producing hydrogen and oxygen, an alkaline water electrolysis method is known. The alkaline water electrolysis method electrolyzes water by using an alkaline aqueous solution (alkaline water) in which an alkali metal hydroxide (e.g., NaOH, KOH, etc.) is dissolved, as an electrolytic solution, thereby generating hydrogen gas from a cathode and oxygen gas from an anode. As an electrolytic cell for alkaline water electrolysis, there is known one comprising: comprises an anode chamber and a cathode chamber partitioned by a membrane having ion permeability, wherein an anode is disposed in the anode chamber, and a cathode is disposed in the cathode chamber. In order to reduce energy loss, an electrolytic cell (zero-gap type electrolytic cell) has been proposed: there is a zero gap configuration, i.e., both the anode and cathode are held in direct contact with the separator.
Documents of the prior art
Patent document
Patent document 1: international publication No. 2013/191140 handbook
Patent document 2: japanese laid-open patent publication No. 2002-332586
Patent document 3: japanese patent No. 4453973
Patent document 4: international publication No. 2014/178317 handbook
Patent document 5: japanese patent No. 6093351
Patent document 6: japanese patent laid-open publication No. 2015-117417
Disclosure of Invention
Problems to be solved by the invention
FIG. 1 is a partial cross-sectional view schematically illustrating a zero-gap electrolytic cell 900 according to an embodiment of the prior art. The zero-gap type electrolytic cell 900 has: a polar cell unit 910, … including a conductive partition wall 911 and a flange 912 that partition an anode chamber a and a cathode chamber C; a diaphragm 920 having ion permeability and disposed between the adjacent polar cell units 910 and 910; spacers 930 and 930 that are disposed between the diaphragm 920 and the flange 912 of the electrode chamber unit 910 and sandwich the peripheral edge of the diaphragm 920; an anode 940 held by ribs 913, and … that are provided upright from the partition wall 911 of the first-stage cell and have conductivity; a current collector 950 held by ribs 914, … that are provided upright from the partition wall 911 of the other electrode cell and that have conductivity; and a cathode 970 which is relatively flexible and is held by an elastic body 960 having conductivity and disposed in contact with the current collector 950. The peripheral edge of the cathode 970 and the peripheral edge of the conductive elastic body 960 are fixed to the peripheral edge of the current collector 950. In the zero gap cell 900, the relatively soft cathode 970 is pushed toward the separator 920 and the anode 940 by the elastic body 960 having conductivity, so that the separator 920 is sandwiched between the adjacent cathode 970 and anode 940. As a result, the separator 920 is in direct contact with the anode 940 and the cathode 970 (i.e., zero gap), and thus the solution resistance between the anode 940 and the cathode 970 is reduced, and thus the energy loss is reduced.
However, as shown in fig. 1, in the peripheral portion of the separator 920, that is, in the portion of the separator 920 near the flange portion 912 (or the spacer 930), the separator 920 is not in direct contact with the anode 940 and the cathode 970 (that is, a gap is not zero), and therefore, the solution resistance between the electrodes in this portion is large, and as a result, the operating voltage is increased.
The present invention addresses the problem of providing a membrane-electrode-gasket composite for alkaline water electrolysis, which enables direct contact between a separator and an electrode even at the peripheral edge of the separator. Also provided is an alkaline water electrolyzer comprising the membrane-electrode-gasket composite.
Means for solving the problems
The present invention includes the following aspects [1] to [14 ].
[1] A membrane-electrode-gasket composite for alkaline water electrolysis,
the membrane-electrode-gasket composite for alkaline water electrolysis comprises:
a membrane having a 1 st membrane face and a 2 nd membrane face;
a 1 st electrode arranged to overlap a 1 st membrane face of the separator; and
a spacer having an electrical insulating property and holding the separator and the 1 st electrode integrally,
the gasket has:
a 1 st surface which is in contact with the anode side frame;
a 2 nd surface which is in contact with the cathode side frame;
a slit portion that is open toward an inner peripheral side and that accommodates an entire peripheral edge portion of the separator and an entire peripheral edge portion of the 1 st electrode;
a 1 st portion and a 2 nd portion which are opposed to each other with the slit therebetween in a direction intersecting the 1 st surface and the 2 nd surface, the 1 st portion having the 1 st surface, the 2 nd portion having the 2 nd surface; and
a connecting portion provided on an outer peripheral side of the slit portion, integrally connecting the 1 st portion and the 2 nd portion, and sealing an outer peripheral end of the slit portion,
the entire peripheral edge portion of the separator and the entire peripheral edge portion of the 1 st electrode accommodated in the slit portion are integrally sandwiched by the 1 st portion and the 2 nd portion.
[2] The membrane-electrode-gasket composite for alkaline water electrolysis according to [1], wherein the 1 st electrode is a 1 st porous plate having flexibility.
[3] The membrane-electrode-gasket composite for alkaline water electrolysis according to [1] or [2], further comprising a 2 nd electrode, wherein the 2 nd electrode is disposed so as to overlap the 2 nd membrane surface of the separator,
the spacer holds the separator, the 1 st electrode, and the 2 nd electrode as one body,
the slit part accommodates the entire peripheral edge part of the separator, the entire peripheral edge part of the 1 st electrode, and the entire peripheral edge part of the 2 nd electrode,
the entire peripheral edge portion of the separator, the entire peripheral edge portion of the 1 st electrode, and the entire peripheral edge portion of the 2 nd electrode, which are housed in the slit portion, are integrally sandwiched by the 1 st portion and the 2 nd portion.
[4] The membrane-electrode-gasket composite for alkaline water electrolysis according to [3], wherein the 2 nd electrode is a rigid porous plate.
[5] The membrane-electrode-gasket composite for alkaline water electrolysis according to [3], wherein the 2 nd electrode is a 2 nd porous plate having flexibility.
[6] An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame defining a cathode chamber;
[1] or [2] the membrane-electrode-gasket composite body sandwiched between the anode-side frame and the cathode-side frame; and
a 2 nd electrode which is not held by the spacer but is arranged so as to be in contact with the 2 nd film surface of the separator,
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the anode chamber, the 2 nd membrane face of the diaphragm faces the cathode chamber,
the 1 st electrode is an anode,
the 2 nd electrode is a cathode.
[7] An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame body defining a cathode chamber;
[1] or [2] the membrane-electrode-gasket composite body sandwiched between the anode-side frame and the cathode-side frame; and
a 2 nd electrode that is not held by the spacer but is disposed in contact with the 2 nd membrane surface of the separator,
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the cathode chamber, the 2 nd membrane face of the diaphragm faces the anode chamber,
the 1 st electrode is a cathode,
the 2 nd electrode is an anode.
[8] An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame body defining a cathode chamber; and
[3] the membrane-electrode-gasket composite according to any one of [5] to [5], which is sandwiched between the anode-side frame and the cathode-side frame;
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the anode chamber, the 2 nd membrane face of the diaphragm faces the cathode chamber,
the 1 st electrode is an anode and is a cathode,
the 2 nd electrode is a cathode.
[9] An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame body defining a cathode chamber; and
[3] the membrane-electrode-gasket composite according to any one of [5] to [5], which is sandwiched between the anode-side frame and the cathode-side frame;
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the cathode chamber, the 2 nd membrane face of the diaphragm faces the anode chamber,
the 1 st electrode is a cathode,
the 2 nd electrode is an anode.
[10] The alkaline water electrolyzer according to any of [6] to [9], wherein the 1 st electrode is a 1 st porous plate having flexibility,
the 1 st electrode is pressed toward the 2 nd electrode by a 1 st elastic body having conductivity.
[11] The alkaline water electrolyzer of [10], wherein the 2 nd electrode is a rigid porous plate.
[12] The alkaline water electrolyzer of [11], wherein the 2 nd electrode is pressed toward the 1 st electrode by a 2 nd elastic body having conductivity.
[13] The alkaline water electrolyzer of [10], wherein the 2 nd electrode is a 2 nd porous plate having flexibility,
the 2 nd electrode is pressed toward the 1 st electrode by a 2 nd elastic body having conductivity.
[14] The alkaline water electrolyzer according to [10], further comprising a rigid current collector having conductivity and disposed in contact with the 2 nd electrode,
the rigid current collector is disposed such that the 2 nd electrode is sandwiched between the rigid current collector and the separator,
the 2 nd electrode is a 2 nd porous plate with flexibility,
the 2 nd electrode is supported by the rigid body current collector.
ADVANTAGEOUS EFFECTS OF INVENTION
The membrane-electrode-gasket composite for alkaline water electrolysis of the present invention can directly contact the separator and the electrode even at the peripheral edge of the separator. Therefore, the alkaline water electrolyzer having the membrane-electrode-gasket assembly for alkaline water electrolysis of the present invention can further reduce the operating voltage, and thus can further reduce the energy loss.
Drawings
Fig. 1 is a sectional view schematically illustrating a zero-gap type electrolytic cell 900 according to an embodiment of the related art.
Fig. 2 is a diagram schematically illustrating a membrane-electrode-gasket assembly 100 for alkaline water electrolysis according to an embodiment of the present invention, in which fig. 2 (a) is a front view, fig. 2 (B) is a right side view, fig. 2 (C) is a rear view, fig. 2 (D) is a cross-sectional view taken along line X-X of fig. 2 (a), and fig. 2 (E) is an exploded view of fig. 2 (D).
Fig. 3 is a view schematically illustrating a membrane-electrode-gasket assembly 200 for alkaline water electrolysis according to another embodiment of the present invention, in which fig. 3 (a) is a front view, fig. 3 (B) is a right side view, fig. 3 (C) is a rear view, fig. 3 (D) is a cross-sectional view taken along line X-X of fig. 3 (a), and fig. 3 (E) is an exploded view of fig. 3 (D).
Fig. 4 is a view schematically illustrating a membrane-electrode-gasket assembly 300 for alkaline water electrolysis according to another embodiment of the present invention, in which fig. 4 (a) is a front view, fig. 4 (B) is a right side view, fig. 4 (C) is a rear view, fig. 4 (D) is a cross-sectional view taken along line X-X of fig. 4 (a), and fig. 4 (E) is an exploded view of fig. 4 (D).
Fig. 5 is a sectional view schematically illustrating an alkaline water electrolyzer 1000 according to an embodiment of the present invention.
Fig. 6 is a sectional view schematically illustrating an alkaline water electrolyzer 2000 according to another embodiment of the present invention.
Fig. 7 is a sectional view schematically illustrating an alkaline water electrolyzer 3000 according to another embodiment of the present invention.
Fig. 8 is a sectional view schematically illustrating an alkaline water electrolyzer 4000 according to another embodiment of the present invention.
Fig. 9 is a sectional view schematically illustrating an alkaline water electrolyzer 5000 according to another embodiment of the present invention.
Fig. 10 is a sectional view schematically illustrating an alkaline water electrolyzer 6000 according to another embodiment of the present invention.
Fig. 11 is a sectional view schematically illustrating an alkaline water electrolyzer 7000 according to another embodiment of the present invention.
Fig. 12 is a sectional view schematically illustrating an alkaline water electrolyzer 8000 according to another embodiment of the present invention.
Fig. 13 is a sectional view schematically illustrating an alkaline water electrolyzer 9000 of another embodiment of the present invention.
Fig. 14 is a sectional view schematically illustrating an alkaline water electrolyzer 10000 according to another embodiment of the present invention.
Detailed Description
The above-described operation and advantages of the present invention will be apparent from the embodiments for carrying out the invention described below. Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to these embodiments. In addition, the drawings do not necessarily reflect the exact dimensions. In the drawings, some reference numerals may be omitted. In the present specification, unless otherwise specified, the expression "a to B" in relation to the numerical values a and B means "a to B inclusive". In the case where only a unit is attached to the numerical value B in this expression, the unit is also applied to the numerical value a. Further, the words "or" and "or" are intended to mean a logical or unless otherwise specified. And, the related element E 1 And E 2 ，“E 1 And/or E 2 "such expression means" E 1 Or E 2 Or E 1 And E 2 The combination of (1), "related to the element E 1 、…、E N (N is an integer of 3 or more), "E 1 、…、E N-1 And/or E N "such expression means" E 1 、…、E N-1 Or E N Or E 1 、…、E N-1 、E N Combinations of (ii).
1. Membrane-electrode-gasket composite for alkaline water electrolysis
Fig. 2 is a diagram schematically illustrating a membrane-electrode-gasket composite 100 for alkaline water electrolysis (hereinafter also referred to as "composite 100") according to an embodiment of the present invention. In fig. 2, (a) in fig. 2 is a front view of composite 100, (B) in fig. 2 is a right side view of composite 100, (C) in fig. 2 is a rear view of composite 100, (D) in fig. 2 is a cross-sectional X-X view of fig. 2 (a), and (E) in fig. 2 is an exploded view of fig. 2 (D). The composite 100 has: a separator 10 having a 1 st membrane face 11 and a 2 nd membrane face 12; a cathode (1 st electrode) 20 disposed so as to overlap the 1 st membrane surface 11 of the separator 10; and a gasket 30 having electrical insulation and holding the separator 10 and the cathode (1 st electrode) 20 together. The gasket 30 has: a 1 st surface 31 which is in contact with the anode side frame; a 2 nd surface 32 which is in contact with the cathode side frame; a slit 33 that opens toward the inner periphery and accommodates the entire peripheral edge of the separator 10 and the entire peripheral edge of the cathode (1 st electrode) 20; a 1 st portion 34 and a 2 nd portion 35 which are opposed to each other with the slit 33 therebetween in a direction intersecting the 1 st surface 31 and the 2 nd surface 32 (a paper surface up-down direction in fig. 2 (D) and (E)), the 1 st portion 34 having the 1 st surface 31, the 2 nd portion 35 having the 2 nd surface 32; and a connecting portion 36 provided on the outer peripheral side of the siping portion 33, integrally connecting the 1 st portion 34 and the 2 nd portion 35, and sealing the outer peripheral end of the siping portion 33. In the composite 100, the entire peripheral edge portion of the separator 10 and the entire peripheral edge portion of the cathode (1 st electrode) 20 accommodated in the slit portion 33 are integrally sandwiched between the 1 st portion 34 and the 2 nd portion 35. As shown in fig. 2 (a), (C), and (D), the cathode (1 st electrode) 20 is disposed on the same side of the separator 10 as the side on which the 2 nd surface 32 of the gasket 30 is disposed. The Y-Y sectional view of fig. 2 (a) is the same as the X-X sectional view of fig. 2 (a), that is, the same as fig. 2 (D).
As the separator 10, a known ion-permeable separator used for a zero-gap type electrolytic cell for alkaline water electrolysis can be used without particular limitation. Ideally, the separator 10 has low gas permeability, low electrical conductivity, and high strength. Examples of the separator 10 include porous separators such as a porous film made of asbestos and/or modified asbestos, a porous separator made of polysulfone polymer, a cloth made of polyphenylene sulfide fiber, a fluorine-based porous film, and a porous film made of a mixed material containing both inorganic material and organic material. In addition to the above porous separators, a fluorine-based ion exchange membrane or the like can be used as the separator 10.
As the cathode (1 st electrode) 20, a known cathode for hydrogen generation used in a zero-gap type electrolytic cell for alkaline water electrolysis can be used without particular limitation. The cathode 20 generally has a conductive substrate and a catalyst layer covering the surface of the substrate. As the conductive substrate in the cathode 20, for example, nickel, a nickel alloy, stainless steel, mild steel, a nickel alloy, or a material obtained by plating a surface of stainless steel or mild steel with nickel can be preferably used. As the catalyst layer in the cathode 20, a noble metal oxide, nickel, cobalt, molybdenum, or manganese, or an oxide of the above, or a coating layer made of a noble metal oxide can be preferably used. The cathode 20 may be, for example, a flexible porous plate or a rigid porous plate. As the cathode 20, which is a rigid porous plate, a porous plate including a rigid conductive base material (e.g., an expanded alloy) and the catalyst layer can be used. As the cathode 20 which is a flexible porous plate, a porous plate including a flexible conductive base material (for example, a metal mesh woven (or knitted) with a metal wire, a thin punching metal, or the like) and the catalyst layer can be used. The area of one hole of the cathode 20 is preferably 0.05 to 2.0mm, which is a flexible porous plate 2 More preferably 0.1 to 0.5mm 2 . The aperture ratio of the cathode 20, which is a flexible porous plate, is preferably 20% or more, and more preferably 20 to 50% with respect to the area of the current-carrying surface. The cathode 20, which is a flexible porous plate, preferably has a bending flexibility of 0.05mm/g or more, and more preferably 0.1 to 0.8 mm/g. In the present specification, the bending softness is a value of: one side of a square sample having a length of 10mm x a width of 10mm was fixed so that the sample was horizontal, and the fixed side was opposed to the other sideA constant downward load was applied to one side, and the bending softness was obtained as the value obtained by dividing the deflection width (mm) of the other side (sample top end) at that time by the load (g). That is, the bending softness is a parameter indicating a property opposite to the bending rigidity. The flexibility in bending can be adjusted by the material and thickness of the porous plate, and in the case of a metal mesh, the flexibility can be adjusted by the weave (or knitting) of the metal wires constituting the metal mesh.
As shown in fig. 2 (a) and (C), the gasket 30 has a shape corresponding to the shape of the anode-side frame and the cathode-side frame. As shown in fig. 2 (B), (D), and (E), the 1 st surface 31 and the 2 nd surface 32 of the gasket 30 are relatively flat surfaces. The gasket 30 is preferably formed of an elastomer having alkali resistance. Examples of the material of the gasket 30 include elastomers such as Natural Rubber (NR), styrene-butadiene rubber (SBR), Chloroprene Rubber (CR), Butadiene Rubber (BR), acrylonitrile-butadiene rubber (NBR), Silicone Rubber (SR), ethylene-propylene rubber (EPT), ethylene-propylene diene rubber (EPDM), Fluorine Rubber (FR), isobutylene-isoprene rubber (IIR), Urethane Rubber (UR), and chlorosulfonated polyethylene rubber (CSM). In the case of using a gasket material having no alkali resistance, a material layer having alkali resistance may be provided on the surface of the gasket material by coating or the like.
The method of making composite 100 is not particularly limited. For example, the peripheral edge portions of the separator 10 and the cathode 20 are sandwiched between an anode-side gasket member having a 1 st surface 31 and a cathode-side gasket member having a 2 nd surface 32, and then the peripheral edge portion of the anode-side gasket member and the peripheral edge portion of the cathode-side gasket member are joined together and integrated by welding, bonding, or the like, whereby a composite 100 in which the peripheral edge portions of the separator 10 and the cathode 20 are held in the slit portion 33 of the gasket 30 having the slit portion 33 and the connection portion 36 can be obtained (see (D) and (E) of fig. 2). For example, after preparing the separator 10, the cathode 20, and the gasket 30, respectively, the gasket 30 may be appropriately deformed, and the peripheral edge portions of the separator 10 and the cathode 20 may be inserted into the slit portions 33 of the gasket 30.
In the membrane-electrode-gasket assembly 100 for alkaline water electrolysis, the entire peripheral edge portion of the separator 10 and the entire peripheral edge portion of the cathode 20, which are accommodated in the slit portion 33 of the gasket 30, are integrally sandwiched between the 1 st portion 34 and the 2 nd portion 35 of the gasket 30, and therefore, at least the separator 10 and the cathode 20 can be brought into direct contact over the entire surface (that is, the peripheral edge portion is included). Therefore, when the composite 100 is used in a zero-gap alkaline water electrolyzer, the operating voltage can be further reduced, and the energy loss can be further reduced. In the conventional zero-gap type electrolytic cell, each electrode is fixed to an electrolytic element (anode-side frame or cathode-side frame), and for fixing the electrode, treatments such as welding and pin fixing are required. In contrast, with the composite 100, the cathode 20 is integrated with the separator 10 and the gasket 30, and therefore, it is not necessary to fix the cathode 20 to the cathode-side frame. Therefore, when the composite 100 is used in a zero-gap alkaline water electrolyzer, the assembly of the electrolyzer can be facilitated. When the peripheral edge portion of the separator 10 is housed in the slit portion 33 of the gasket 30, the gasket 30 has the connection portion 36 for sealing the outer peripheral end of the slit portion 33 on the outer peripheral side of the slit portion 33, and therefore, the electrolyte solution and the gas can be prevented from leaking from the end portion of the separator 10 to the outside of the electrolytic cell due to the capillary phenomenon.
In the above description of the present invention, the composite 100 having the separator 10, the cathode 20, and the gasket 30 has been described as an example, but the present invention is not limited to this embodiment. For example, a membrane-electrode-gasket composite for alkaline water electrolysis may be provided with an anode instead of the cathode 20.
Fig. 3 is a view schematically illustrating the membrane-electrode-gasket assembly 200 for alkaline water electrolysis (hereinafter also referred to as "assembly 200") according to another embodiment as described above. In fig. 3, (a) in fig. 3 is a front view of the composite 200, (B) in fig. 3 is a right side view of the composite 200, (C) in fig. 3 is a rear view of the composite 200, (D) in fig. 3 is a cross-sectional view X-X in fig. 3, (a) in fig. 3, and (E) in fig. 3 is an exploded view in fig. 3, (D). In fig. 3, the same reference numerals as in fig. 2 are given to elements already shown in fig. 2, and the description thereof is omitted. The composite 200 has: a membrane 10 having a 1 st membrane face 11 and a 2 nd membrane face 12; an anode (1 st electrode) 40 disposed so as to overlap the 1 st membrane surface 11 of the separator 10; and a spacer 30 having electrical insulation and holding the separator 10 and the anode (1 st electrode) 40 together. The gasket 30 has: a 1 st surface 31 which is in contact with the anode side frame; a 2 nd surface 32 which is in contact with the cathode side frame; a slit 33 that opens toward the inner periphery and accommodates the entire peripheral edge of the separator 10 and the entire peripheral edge of the anode (1 st electrode) 40; a 1 st portion 34 and a 2 nd portion 35 which are opposed to each other across the slit portion 33 in a direction intersecting the 1 st surface 31 and the 2 nd surface 32, the 1 st portion 34 having the 1 st surface 31, the 2 nd portion 35 having the 2 nd surface 32; and a connecting portion 36 provided on the outer peripheral side of the siping portion 33, integrally connecting the 1 st portion 34 and the 2 nd portion 35, and sealing the outer peripheral end of the siping portion 33. In the composite 200, the entire peripheral edge portion of the separator 10 and the entire peripheral edge portion of the anode (1 st electrode) 40 housed in the slit portion 33 are integrally sandwiched between the 1 st portion 34 and the 2 nd portion 35. As shown in fig. 3 (a), (C), and (D), the anode (1 st electrode) 40 is disposed on the same side as the 1 st surface 31 of the gasket 30 with respect to the separator 10. The Y-Y sectional view of fig. 3 (a) is the same as the X-X sectional view of fig. 3 (a), that is, the same as fig. 3 (D).
The separator 10 and gasket 30 in composite 200 are the same as the separator 10 and gasket 30 in composite 100. As the anode (1 st electrode) 40, a known anode for oxygen generation used in a zero gap type electrolytic cell for alkaline water electrolysis can be used without particular limitation. The anode 40 generally has a conductive substrate and a catalyst layer covering the surface of the substrate. The catalyst layer is preferably porous. As the conductive base material in the anode 40, for example, nickel iron, vanadium, molybdenum, copper, silver, manganese, a platinum group element, graphite, or chromium, or a combination of these can be used. In the anode 40, a conductive base material made of nickel can be preferably used. The catalyst layer contains nickel element. The catalyst layer preferably contains nickel oxide, metallic nickel or nickel hydroxide, or a combination of these, and may also contain an alloy of nickel and one or more other metals. The catalyst layer is particularly preferably made of metallic nickel. The catalyst layer may further contain chromium, molybdenum, cobalt, tantalum, zirconium, aluminum, zinc, a platinum group element, a rare earth element, or a combination thereof. The surface of the catalyst layer may further contain rhodium, palladium, iridium, or ruthenium as an additional catalyst, or a combination thereof. AnodeThe material 40 may be, for example, a flexible porous plate or a rigid porous plate. As the anode 40 which is a rigid porous plate, a porous plate including a rigid conductive base material (for example, an expanded alloy or the like) and the catalyst layer can be used. As the anode 40 which is a flexible porous plate, a porous plate including a flexible conductive base material (for example, a metal mesh woven (or knitted) with a metal wire, a thin punching metal, or the like) and the catalyst layer can be used. The area of one hole of the anode 40 is preferably 0.05 to 2.0mm, which is a flexible porous plate 2 More preferably 0.1 to 0.5mm 2 . The aperture ratio of the anode 40, which is a flexible porous plate, is preferably 20% or more, and more preferably 20 to 50% with respect to the area of the current-carrying surface. The bending flexibility of the anode 40, which is a flexible porous plate, is preferably 0.05mm/g or more, and more preferably 0.1 to 0.8 mm/g.
The method of manufacturing the composite 200 is not particularly limited. For example, the peripheral edge portions of the separator 10 and the anode 40 are sandwiched between an anode-side gasket member having the 1 st surface 31 and a cathode-side gasket member having the 2 nd surface 32, and then the peripheral edge portion of the anode-side gasket member and the peripheral edge portion of the cathode-side gasket member are joined together and integrated by welding, bonding, or the like, whereby a composite 200 in which the peripheral edge portions of the separator 10 and the anode 40 are held in the slit portion 33 of the gasket 30 having the slit portion 33 and the connection portion 36 can be obtained (see (D) and (E) of fig. 3). For example, after preparing the separator 10, the anode 40, and the gasket 30, respectively, the gasket 30 may be appropriately deformed, and the peripheral edge portions of the separator 10 and the anode 40 may be inserted into the slit portions 33 of the gasket 30.
In the membrane-electrode-gasket assembly 200 for alkaline water electrolysis, the entire peripheral edge portion of the separator 10 and the entire peripheral edge portion of the anode 40, which are accommodated in the slit portion 33 of the gasket 30, are integrally sandwiched between the 1 st portion 34 and the 2 nd portion 35 of the gasket 30, and therefore, at least the separator 10 and the anode 40 can be brought into direct contact over the entire surface (that is, the peripheral edge portion is included). Therefore, when the composite 200 is used in a zero-gap alkaline water electrolyzer, the operating voltage can be further reduced, and the energy loss can be further reduced. In the conventional zero-gap type electrolytic cell, each electrode is fixed to an electrolytic element (anode-side frame or cathode-side frame), and for fixing the electrode, treatments such as welding and pin fixing are required. In contrast, with the composite 200, the anode 40 is integrated with the separator 10 and the gasket 30, and therefore, it is not necessary to fix the anode 40 to the anode-side frame. Therefore, by using the composite 200 in a zero-gap alkaline water electrolyzer, the assembly of the electrolyzer can be facilitated. When the peripheral edge portion of the separator 10 is housed in the slit portion 33 of the gasket 30, the gasket 30 has the connection portion 36 for sealing the outer peripheral end of the slit portion 33 on the outer peripheral side of the slit portion 33, and therefore, it is possible to prevent the electrolyte or gas from leaking from the end portion of the separator 10 to the outside of the electrolytic cell due to the capillary phenomenon.
In the above description of the present invention, the composite 100 having the form of the separator 10, the cathode 20, and the gasket 30, and the composite 200 having the form of the separator 10, the anode 40, and the gasket 30 have been described as examples, but the present invention is not limited to this form. For example, a membrane-electrode-gasket composite for alkaline water electrolysis having both a cathode and an anode can be provided.
Fig. 4 is a view schematically illustrating the membrane-electrode-gasket assembly 300 for alkaline water electrolysis (hereinafter also referred to as "assembly 300") according to another embodiment as described above. In fig. 4, (a) in fig. 4 is a front view of the composite 300, (B) in fig. 4 is a right side view of the composite 300, (C) in fig. 4 is a rear view of the composite 300, (D) in fig. 4 is an X-X sectional view of (a) in fig. 4, and (E) in fig. 4 is an exploded view of (D) in fig. 4. In fig. 4, the same reference numerals as those in fig. 2 to 3 are given to elements already shown in fig. 2 to 3, and the description thereof is omitted. The composite 300 has: a membrane 10 having a 1 st membrane face 11 and a 2 nd membrane face 12; an anode (1 st electrode) 40 disposed so as to overlap the 1 st membrane surface 11 of the separator 10; a cathode (2 nd electrode) 20 disposed so as to overlap the 2 nd membrane surface 12 of the separator 10; and a gasket 30 having electrical insulation and integrally holding the separator 10, the anode (1 st electrode) 40, and the cathode (2 nd electrode) 20. The gasket 30 has: a 1 st surface 31 which is in contact with the anode side frame; a 2 nd surface 32 which is in contact with the cathode side frame; a slit 33 that opens toward the inner periphery and accommodates the entire peripheral edge of the separator 10, the entire peripheral edge of the anode (1 st electrode) 40, and the entire peripheral edge of the cathode (2 nd electrode) 20; a 1 st portion 34 and a 2 nd portion 35 which face each other with the slit 33 therebetween in a direction intersecting the 1 st surface 31 and the 2 nd surface 32 (a vertical direction of the paper surface in fig. 4 (D) and (E)), the 1 st portion 34 having the 1 st surface 31, the 2 nd portion 35 having the 2 nd surface 32; and a connecting portion 36 provided on the outer peripheral side of the slit portion 33, integrally connecting the 1 st portion 34 and the 2 nd portion 35, and sealing the outer peripheral end of the slit portion 33. In the composite 300, the entire periphery of the separator 10, the entire periphery of the anode (1 st electrode) 40, and the entire periphery of the cathode (2 nd electrode) 20 accommodated in the slit portion 33 are integrally sandwiched by the 1 st portion 34 and the 2 nd portion 35. As shown in fig. 4 (a), (C) and (D), the anode (1 st electrode) 40 is disposed on the same side of the separator 10 as the 1 st surface 31 of the gasket 30, and the cathode (2 nd electrode) 20 is disposed on the same side of the separator 10 as the 2 nd surface 32 of the gasket 30. The Y-Y sectional view of fig. 4 (a) is the same as the X-X sectional view of fig. 4 (a), that is, the same as fig. 4 (D).
Separator 10, anode 40, cathode 20, and gasket 30 in composite 300 are the same as separator 10, anode 40, cathode 20, and gasket 30 in composite 100 and composite 200, respectively.
The method of manufacturing the composite 300 is not particularly limited. For example, the peripheral edge portions of the anode 40, the separator 10, and the cathode 20 are sandwiched by an anode-side gasket member having a 1 st surface 31 and a cathode-side gasket member having a 2 nd surface 32, and then the peripheral edge portion of the anode-side gasket member and the peripheral edge portion of the cathode-side gasket member are joined together and integrated by welding, bonding, or the like, thereby obtaining a composite 300 in which the peripheral edge portions of the anode 40, the separator 10, and the cathode 20 are held in the slit portion 33 of the gasket 30 having the slit portion 33 and the connection portion 36 (see (D) and (E) of fig. 4). For example, after preparing the separator 10, the anode 40, the cathode 20, and the gasket 30, respectively, the gasket 30 may be appropriately deformed, and the peripheral edge portions of the separator 10, the anode 40, and the cathode 20 may be inserted into the slit portions 33 of the gasket 30.
In the membrane-electrode-gasket assembly 300 for alkaline water electrolysis, the entire peripheral edge portion of the separator 10, the entire peripheral edge portion of the anode 40, and the entire peripheral edge portion of the cathode 20, which are accommodated in the slit portion 33 of the gasket 30, are integrally sandwiched between the 1 st portion 34 and the 2 nd portion 35 of the gasket 30, so that the anode 40 and the separator 10 can be brought into direct contact over the entire surface (that is, the peripheral edge portion is also included), and the separator 10 and the cathode 20 can be brought into direct contact over the entire surface (that is, the peripheral edge portion is also included). Therefore, when the composite 300 is used in a zero-gap alkaline water electrolyzer, the operating voltage can be further reduced, and the energy loss can be further reduced. In the conventional zero-gap type electrolytic cell, each electrode is fixed to an electrolytic element (anode-side frame or cathode-side frame), and for fixing the electrode, treatments such as welding and pin fixing are required. In contrast, with the composite 300, the anode 40 and the cathode 20 are integrally formed with the separator 10 and the gasket 30, and therefore, there is no need to fix the anode 40 to the anode-side frame and also no need to fix the cathode 20 to the cathode-side frame. Therefore, when the composite 300 is used in a zero-gap alkaline water electrolyzer, the assembly of the electrolyzer can be facilitated. When the peripheral edge portion of the separator 10 is housed in the slit portion 33 of the gasket 30, the gasket 30 has the connection portion 36 for sealing the outer peripheral end of the slit portion 33 on the outer peripheral side of the slit portion 33, and therefore, the electrolyte solution and the gas can be prevented from leaking from the end portion of the separator 10 to the outside of the electrolytic cell due to the capillary phenomenon.
In the above description of the present invention, the composite 100, the composite 200, and the composite 300 having the gasket 30 having the quadrangular shape have been described as examples, but the present invention is not limited to this embodiment. The membrane-electrode-gasket composite for alkaline water electrolysis may be formed to have a gasket having a ring shape or a polygonal shape other than a square shape (for example, a hexagonal shape or an octagonal shape). The shape of the separator, cathode and anode is determined to match the shape of the gasket.
2. Alkaline water electrolytic bath
Fig. 5 is a sectional view schematically illustrating an alkaline water electrolyzer 1000 (hereinafter also referred to as "electrolyzer 1000") according to an embodiment of the present invention. The electrolytic cell 1000 is an alkaline water electrolytic cell having the membrane-electrode-gasket composite 100 (see fig. 2) described above. As shown in fig. 5, the electrolytic cell 1000 includes: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; a composite body 100 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32; and an anode (2 nd electrode) 41 which is not held by the spacer 30 but is disposed in contact with the 2 nd membrane surface 12 of the separator 10. In the electrolytic cell 1000, the composite 100 is arranged: the 1 st membrane surface 11 of the diaphragm 10 faces the cathode chamber C, and the 2 nd membrane surface 12 of the diaphragm 10 faces the anode chamber a. In the electrolytic cell 1000, the cathode (1 st electrode) 20 is a flexible porous plate (1 st porous plate), and the anode (2 nd electrode) 41 is a rigid porous plate (2 nd porous plate). The electrolytic cell 1000 further includes conductive ribs 61, … (hereinafter also referred to as "conductive ribs 61") provided so as to protrude from the inner wall of the anode side frame 51, and the anode 41 is held by the conductive ribs 61. The electrolytic cell 1000 further has: the cathode 20 is pressed against the anode 41 by the elastic body 82, and includes conductive ribs 62, … (hereinafter also referred to as "conductive ribs 62") provided so as to protrude from the inner wall of the cathode-side frame 52, the current collector 72 held by the conductive ribs 62, and the elastic body (1 st elastic body) 82 held by the current collector 72 and having conductivity.
As the anode-side frame 51 and the cathode-side frame 52, any known frame for an alkaline water electrolysis cell can be used without particular limitation as long as the anode chamber a and the cathode chamber C can be defined, respectively. The anode-side frame 51 includes: a back partition wall 51a having conductivity; and a flange 51b joined to the entire periphery of the rear partition 51a in a liquid-tight manner. Similarly, the cathode-side frame 52 also includes: a back-side partition wall 52a having conductivity; and a flange portion 52b joined to the entire periphery of the rear partition wall 52a in a liquid-tight manner. The back partition walls 51a, 52a divide adjacent unit cells and electrically connect the adjacent unit cells in series. Flange 51b defines an anode chamber together with rear partition wall 51a, diaphragm 10 and gasket 30, and flange 52b defines a cathode chamber together with rear partition wall 52a, diaphragm 10 and gasket 30. Flange portions 51b and 52b have a shape corresponding to gasket 30 of composite 100. That is, when the gasket 30 of the composite 100 is sandwiched between the anode-side frame 51 and the cathode-side frame 52, the flange 51b of the anode-side frame 51 is in contact with the 1 st surface 31 of the gasket 30 without a gap, and the flange 52b of the cathode-side frame 52 is in contact with the 2 nd surface 32 of the gasket 30 without a gap. Although not shown in fig. 5, the flange portion 51b includes: an anolyte supply passage for supplying anolyte to the anode chamber A; and an anolyte recovery passage for recovering anolyte and gas generated at the anode from the anode chamber A. The flange portion 52b includes: a catholyte supply channel for supplying catholyte to the cathode chamber C; and a catholyte recovery passage for recovering catholyte and a gas generated in the cathode from the cathode chamber C. As the material of the back partition walls 51a, 52a, a rigid conductive material having alkali resistance can be used without particular limitation, and examples of such a material include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and a metal material obtained by plating these materials with nickel. As the material of the flange portions 51b, 52b, a rigid material having alkali resistance can be used without particular limitation, and examples of such a material include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; a metal material obtained by plating these materials with nickel; and non-metallic materials such as reinforced plastics. The back partition wall 51a and the flange 51b of the anode side frame 51 may be joined together by welding, adhesion, or the like, or may be integrally formed of the same material. Similarly, the rear partition wall 52a and the flange 52b of the cathode-side frame 52 may be joined together by welding, adhesion, or the like, or may be integrally formed of the same material. In fig. 5, only a single unit cell (cell 1000) is shown, but the flange portion 51b of the anode side frame 51 may extend further to the opposite side (right side in the drawing of fig. 5) with respect to the back partition wall 51a to define the cathode chamber of the adjacent unit cell together with the back partition wall 51a, and the flange portion 52b of the cathode side frame 52 may extend further to the opposite side (left side in the drawing of fig. 5) with respect to the back partition wall 52a to define the anode chamber of the adjacent unit cell together with the back partition wall 52 a.
As the conductive ribs 61 and 62, known ones for use in alkaline water electrolyzers can be used without particular limitation. In the electrolytic cell 1000, the conductive rib 61 is provided so as to stand from the back partition 51a of the anode side frame 51, and the conductive rib 62 is provided so as to stand from the back partition 52a of the cathode side frame. The shape, number, and arrangement of the conductive ribs 61 are not particularly limited as long as the conductive ribs 61 can fix and hold the anode 41 to the anode side frame 51. The shape, number, and arrangement of the conductive ribs 62 are not particularly limited as long as the conductive ribs 62 can fix and hold the current collector 72 to the cathode-side frame 52. As the material of the conductive ribs 61 and 62, a rigid conductive material having alkali resistance can be used without particular limitation, and examples of such a material include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and a material such as a metal obtained by plating these materials with nickel.
As the current collector 72, a known current collector used for an alkaline water electrolytic cell can be used without particular limitation, and for example, an expanded alloy made of a rigid conductive material having alkali resistance, a pressed metal, or the like can be preferably used. Examples of the material of the current collector 72 include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and metals obtained by plating these materials with nickel. When the current collector 72 is held by the conductive rib 62, a known method such as welding or pin fixing can be used without particular limitation.
As the elastic body 82, a known conductive elastic body used for an alkaline water electrolysis cell can be used without particular limitation, and for example, an elastic pad, a coil spring, a plate spring, or the like, which is composed of a metal wire assembly made of a conductive material having alkali resistance, can be preferably used. Examples of the material of the elastic body 82 include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and metals obtained by plating these materials with nickel. In holding the elastic body 82 to the current collector 72, a known method such as welding, pin fixing, and bolt fixing can be used without particular limitation.
As the anode 41, a rigid porous plate similar to the anode 40 described above in connection with the composite 200 (fig. 3) as an anode for alkaline water electrolysis can be used without particular limitation. When the anode 41 is held by the rib 61, a known method such as welding, pin fixing, and bolt fixing can be used without particular limitation.
Since the electrolytic cell 1000 includes the membrane-electrode-gasket composite 100 for alkaline water electrolysis, at least the separator 10 and the cathode 20 can be brought into direct contact over the entire surface (i.e., including the peripheral edge). Therefore, with the electrolytic cell 1000, the operating voltage can be further reduced and the energy loss can be further reduced as compared with the conventional zero-gap electrolytic cell. Further, since the cathode 20 is integrally formed with the separator 10 and the gasket 30, it is not necessary to fix the cathode 20 to the cathode-side frame 52. Therefore, the electrolytic cell 1000 can be easily assembled. When the peripheral edge portion of the separator 10 is housed in the slit portion 33 of the gasket 30, the gasket 30 has the connection portion 36 for sealing the outer peripheral end of the slit portion 33 on the outer peripheral side of the slit portion 33, and therefore, the electrolyte solution and the gas can be prevented from leaking from the end portion of the separator 10 to the outside of the electrolytic cell due to the capillary phenomenon.
In the above description of the present invention, the alkaline water electrolyzer 1000 having the composite 100 is taken as an example, but the present invention is not limited to this embodiment. For example, an alkaline water electrolyzer having the above-described composite 200 (fig. 3) can be used. Fig. 6 is a sectional view schematically illustrating an alkaline water electrolyzer 2000 (hereinafter also referred to as "electrolyzer 2000") according to another embodiment as described above. In fig. 6, the same reference numerals as those in fig. 2 to 5 are given to elements already shown in fig. 2 to 5, and the description thereof is omitted. As shown in fig. 6, the electrolytic cell 2000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; a composite body 200 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32; and a cathode (2 nd electrode) 21 not held by the spacer 30 but arranged in contact with the 2 nd membrane surface 12 of the separator 10. In the electrolytic cell 2000, the composite 200 is configured such that: the 1 st membrane surface 11 of the diaphragm 10 faces the anode chamber a, and the 2 nd membrane surface 12 of the diaphragm 10 faces the cathode chamber C. In the electrolytic cell 1000, the anode (1 st electrode) 40 is a flexible porous plate (1 st porous plate), and the cathode (2 nd electrode) 21 is a rigid porous plate (2 nd porous plate). The electrolytic cell 2000 further includes a conductive rib 62 provided to protrude from the inner wall of the cathode side frame 52, and the cathode 21 is held by the conductive rib 62. The electrolytic cell 2000 further has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, and an elastic body (1 st elastic body) 81 held by the current collector 71 and having conductivity, wherein the anode 40 is pressed toward the cathode 21 by the elastic body 81.
As the current collector 71, a known current collector used for an alkaline water electrolysis cell can be used without particular limitation, and for example, an expanded alloy made of a rigid conductive material having alkali resistance, a pressed metal, a mesh, or the like can be preferably used. Examples of the material of current collector 71 include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and metals obtained by plating these materials with nickel. When holding current collector 71 on conductive rib 61, a known method such as welding or pinning can be used without particular limitation.
As the elastic body 81, a known conductive elastic body used for an alkaline water electrolysis cell can be used without particular limitation, and for example, an elastic pad, a coil spring, a plate spring, or the like, which is composed of a metal wire assembly made of a conductive material having alkali resistance, can be preferably used. Examples of the material of the current collector 81 include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and metals obtained by plating these materials with nickel. In holding the elastic body 81 on the current collector 71, a known method such as welding or pinning can be used without particular limitation.
As the cathode 21, a rigid porous plate as a cathode for alkaline water electrolysis similar to the cathode 20 described above in connection with the composite 100 (fig. 2) can be used without particular limitation. When the cathode 21 is held by the rib 62, a known method such as welding, pin fixing, and bolt fixing can be used without particular limitation.
Since the electrolytic cell 2000 includes the membrane-electrode-gasket assembly 200 for alkaline water electrolysis, at least the separator 10 and the anode 40 can be brought into direct contact over the entire surface (i.e., including the peripheral edge). Therefore, the electrolytic cell 2000 can reduce the operating voltage and the energy loss more than the conventional zero-gap electrolytic cell. Further, since the anode 40 is integrally formed with the separator 10 and the gasket 30, it is not necessary to fix the anode 40 to the anode side frame 51. Therefore, the electrolytic cell 2000 can be easily assembled. When the peripheral edge portion of the separator 10 is housed in the slit portion 33 of the gasket 30, the gasket 30 has the connection portion 36 for sealing the outer peripheral end of the slit portion 33 on the outer peripheral side of the slit portion 33, and therefore, the electrolyte solution and the gas can be prevented from leaking from the end portion of the separator 10 to the outside of the electrolytic cell due to the capillary phenomenon.
In the above description of the present invention, the alkaline water electrolytic bath 1000 of the type in which the rigid porous plate 2 nd electrode 41 is held by the conductive rib 61 and the alkaline water electrolytic bath 2000 of the type in which the rigid porous plate 2 nd electrode 21 is held by the conductive rib 62 have been described as examples, but the present invention is not limited to this embodiment. For example, the alkaline water electrolyzer may be configured such that the 2 nd electrode, which is a rigid porous plate, is pressed toward the 1 st electrode by the 2 nd elastic body having conductivity. Fig. 7 is a sectional view schematically illustrating an alkaline water electrolyzer 3000 (hereinafter also referred to as "electrolyzer 3000") according to another embodiment as described above. In fig. 7, the same elements as those already shown in fig. 2 to 6 are denoted by the same reference numerals as those in fig. 2 to 6, and the description thereof is omitted. As shown in fig. 7, the electrolytic cell 3000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; a composite body 100 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32; and an anode (2 nd electrode) 41 which is not held by the spacer 30 but is disposed in contact with the 2 nd membrane surface 12 of the separator 10. In electrolytic cell 3000, composite 100 is arranged: the 1 st membrane surface 11 of the diaphragm 10 faces the cathode chamber C, and the 2 nd membrane surface 12 of the diaphragm 10 faces the anode chamber a. In the electrolytic cell 3000, the cathode (1 st electrode) 20 is a flexible porous plate (1 st porous plate). The anode (2 nd electrode) 41 may be a rigid porous plate or a flexible porous plate (2 nd porous plate), but is preferably a rigid porous plate. The electrolytic cell 3000 has: the cathode 20 includes a conductive rib 62 provided to protrude from an inner wall of the cathode-side frame 52, a current collector 72 held by the conductive rib 62, and an elastic body (1 st elastic body) 82 having conductivity and held by the current collector 72, and the cathode is pressed toward the anode 41 by the elastic body 82. The electrolytic bath 3000 further has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, and an elastic body (2 nd elastic body) 81 held by the current collector 71 and having conductivity, wherein the anode 41 is pressed toward the cathode 20 by the elastic body 81.
In the electrolytic cell 3000, not only the 1 st electrode 20 integrated with the composite 100 is pressed toward the anode 41 (toward the separator 10) by the 1 st elastic body 82, but also the 2 nd electrode 41 not integrated with the composite 100 is pressed toward the cathode 20 (that is, toward the separator 10) by the 2 nd elastic body 81. Therefore, it is not necessary to fix the 1 st electrode 20 integrated with the composite 100 to the frame 52, and it is not necessary to fix the 2 nd electrode 41 not integrated with the composite 100 to the frame 51. Therefore, the electrolytic cell 3000 can be easily assembled. Further, since the separator 10 receives the pressure of the elastic body from both the anode side and the cathode side, the deformation of the separator 10 in the vicinity of the peripheral edge portion of the 2 nd electrode 41 is easily reduced. The effects described above with respect to the electrolytic cell 1000 can be obtained in the same manner.
In the above description of the present invention, the alkaline water electrolytic cell 1000, the alkaline water electrolytic cell 2000, and the alkaline water electrolytic cell 3000 of the type in which the 2 nd electrode, which is not integrated with the composite body 100, is a rigid porous plate have been described as examples, but the present invention is not limited to this embodiment. For example, the alkaline water electrolysis cell may be configured such that the 2 nd electrode, which is not integrated with the membrane-electrode-gasket composite for alkaline water electrolysis, is a porous plate having flexibility. Fig. 8 is a sectional view schematically illustrating an alkaline water electrolyzer 4000 (hereinafter also referred to as "electrolyzer 4000") according to another embodiment as described above. In fig. 8, the same reference numerals as those in fig. 2 to 7 are given to elements already shown in fig. 2 to 7, and the description thereof is omitted. As shown in fig. 8, the electrolytic cell 4000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; a composite body 100 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32; and an anode (2 nd electrode) 42 not held by the spacer 30 but disposed in contact with the 2 nd membrane surface 12 of the separator 10. In electrolytic cell 4000, composite 100 is configured such that: the 1 st membrane surface 11 of the membrane 10 faces the cathode chamber C, and the 2 nd membrane surface 12 of the membrane 10 faces the anode chamber A. In the electrolytic cell 4000, the cathode (1 st electrode) 20 is a flexible porous plate (1 st porous plate), and the anode (2 nd electrode) 42 is a flexible porous plate (2 nd porous plate). The electrolytic cell 4000 has: the cathode 20 includes a conductive rib 62 provided to protrude from an inner wall of the cathode side frame 52, a current collector 72 held by the conductive rib 62, and an elastic body (1 st elastic body) 82 held by the current collector 72 and having conductivity, and the elastic body 82 presses the cathode 20 toward the anode 42. The electrolytic cell 4000 further has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, an elastic body (2 nd elastic body) 81 held by the current collector 71 and having conductivity, and a rigid current collector 91 arranged between the elastic body 81 and the anode 42 and having conductivity, wherein the anode 42 is pressed toward the cathode 20 by the elastic body 81 via the rigid current collector 91. That is, in the electrolytic cell 4000, the rigid current collector 91 is disposed so that the 2 nd electrode (anode) 42 is sandwiched between the rigid current collector 91 and the separator 10, and the 2 nd electrode (anode) 42 is supported by the rigid current collector 91.
As the rigid current collector 91, a rigid current collector having conductivity can be used, and for example, an expanded alloy made of a rigid conductive material having alkali resistance, a pressed metal, or the like can be preferably used. Examples of the material of the rigid current collector 91 include a single metal such as nickel or iron; stainless steel such as SUS304, SUS310S, SUS316, and SUS 316L; and metals obtained by plating these materials with nickel. The rigid current collector 91 may be held by the elastic body 81 or may not be held by the elastic body 81. When the rigid current collector 91 is held by the elastic body 81, a known method such as welding, pin fixing, or bolt fixing can be used without particular limitation.
In the electrolytic cell 4000, the 1 st electrode 20 integrated with the composite 100 is pressed by the 1 st elastic body 82 toward the anode 42 (i.e., toward the separator 10), and the 2 nd electrode 42 not integrated with the composite 100 is also pressed by the 2 nd elastic body 81 toward the cathode 20 (i.e., toward the separator 10) via the rigid current collector 91. Therefore, it is not necessary to fix the 1 st electrode 20 integrated with the composite 100 to the frame 52, and it is not necessary to fix the 2 nd electrode 42 not integrated with the composite 100 to the frame 51. Thus, the electrolytic cell 4000 can be easily assembled. Furthermore, since the elastic body 81 presses the 2 nd electrode 42 via the rigid current collector 91 (that is, the 2 nd electrode 42 is supported from the back by the rigid current collector 91), even when the 2 nd electrode, which is not integrally formed with the composite body, is flexible, the pressure when pressing both electrodes toward the separator 10 can be made more uniform over the entire surfaces of both electrodes, and thus the current density can be made more uniform. Moreover, since the diaphragm 10 receives the pressure of the elastic body from both the anode side and the cathode side, the deformation of the diaphragm 10 in the vicinity of the gasket 30 is easily reduced. The effects described above with respect to the electrolytic cell 1000 can be obtained in the same manner.
In the above description of the present invention, the alkaline water electrolytic cell 1000, the alkaline water electrolytic cell 2000, the alkaline water electrolytic cell 3000, and the alkaline water electrolytic cell 4000 (fig. 5 to 8) each having the composite body 100 (fig. 2) in which the separator 10 and the cathode 20 are integrally formed with the gasket 30 or the composite body 200 (fig. 3) in which the separator 10 and the anode 40 are integrally formed with the gasket 30 have been described as examples, but the present invention is not limited to this embodiment. For example, the alkaline water electrolyzer may be configured to have a composite body 300 (fig. 4) in which the separator 10, the cathode 20, and the anode 40 are integrated with the gasket 30. Fig. 9 is a sectional view schematically illustrating the alkaline water electrolyzer 5000 (hereinafter also referred to as "electrolyzer 5000") according to another embodiment as described above. In fig. 9, the same reference numerals as those in fig. 2 to 8 are given to elements already shown in fig. 2 to 8, and the description thereof is omitted. As shown in fig. 9, the electrolytic cell 5000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; and a composite body 300 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32. In the electrolytic cell 5000, the composite 300 is configured such that: anode 40 faces anode chamber a and cathode 20 faces cathode chamber C. In the electrolytic cell 5000, the cathode (1 st electrode) 20 is a flexible porous plate (1 st porous plate). The anode (2 nd electrode) 40 may be a flexible porous plate (2 nd porous plate) or a rigid porous plate. The electrolytic cell 5000 has: the cathode 20 includes a conductive rib 62 provided to protrude from an inner wall of the cathode side frame 52, a current collector 72 held by the conductive rib 62, and an elastic body (1 st elastic body) 82 held by the current collector 72 and having conductivity, and the cathode is pressed toward the anode 40 by the elastic body 82. The electrolytic cell 5000 further has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, and a current collector 71 held by the conductive rib 61, and the anode 40 is supported from the back by the current collector 71.
Since the electrolytic cell 5000 includes the membrane-electrode-gasket assembly 300 for alkaline water electrolysis, the separator 10 and the cathode 20 can be brought into direct contact over the entire surface (i.e., including the peripheral edge), and the separator 10 and the anode 40 can be brought into direct contact over the entire surface (i.e., including the peripheral edge). Therefore, the electrolytic cell 5000 can further reduce the operating voltage and the energy loss as compared with the conventional zero-gap electrolytic cell. Further, since the anode 40 and the cathode 20 are integrally formed together with the separator 10 and the gasket 30, there is no need to fix the anode 40 to the anode-side frame 51 or the cathode 20 to the cathode-side frame 52. Therefore, the electrolytic cell 5000 can be easily assembled. When the peripheral edge portion of the separator 10 is housed in the slit portion 33 of the gasket 30, the gasket 30 has the connection portion 36 for sealing the outer peripheral end of the slit portion 33 on the outer peripheral side of the slit portion 33, and therefore, the electrolyte solution and the gas can be prevented from leaking from the end portion of the separator 10 to the outside of the electrolytic cell due to the capillary phenomenon.
In the above description of the present invention, the alkaline water electrolyzer 5000 having the current collector 71 supported by the conductive ribs 61 and the anode 40 supported from the back by the current collector 71 has been described as an example, but the present invention is not limited to this embodiment. For example, when the anode 40 is a rigid porous electrode, the alkaline water electrolyzer may be configured such that the anode 40 is directly supported from the back of the anode 40 by the conductive ribs 61 without the current collector 71.
In the above description of the present invention, the alkaline water electrolytic bath 5000 of the type in which the cathode 20 is a flexible porous plate, is pressed toward the anode 40 by the elastic body 82, and the anode 40 is supported from behind by the conductive rib 61 and the current collector 71 has been described as an example, but the present invention is not limited to this type. For example, the anode may be a flexible porous plate and pressed by an elastic body toward the cathode, and the cathode may be supported from behind by the conductive rib and the current collector. Fig. 10 is a sectional view schematically illustrating an alkaline water electrolyzer 6000 (hereinafter also referred to as "electrolyzer 6000") according to another embodiment as described above. In fig. 10, the same reference numerals as those in fig. 2 to 9 are given to elements already shown in fig. 2 to 9, and the description thereof is omitted. As shown in fig. 10, the electrolytic cell 6000 includes: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; and a composite body 300 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32. In electrolytic cell 6000, composite 300 is arranged: the anode 40 faces the anode chamber a and the cathode 20 faces the cathode chamber C. In the electrolytic cell 6000, the anode (1 st electrode) 40 is a flexible porous plate (1 st porous plate). The cathode (2 nd electrode) 20 may be a flexible porous plate (2 nd porous plate) or a rigid porous plate. The electrolytic cell 6000 has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, and an elastic body (1 st elastic body) 81 held by the current collector 71 and having conductivity, wherein the anode 40 is pressed toward the cathode 20 by the elastic body 81. The electrolytic cell 6000 further has: the cathode 20 is supported from the back by the current collector 72, the conductive rib 62 provided to protrude from the inner wall of the cathode side frame 52, and the current collector 72 held by the conductive rib 62. The alkaline water electrolyzer 6000 of the above-described embodiment can also provide the same effects as those of the electrolyzer 5000 described above.
In the above description of the present invention, the alkaline water electrolyzer 6000 having the current collector 72 supported by the conductive ribs 62 and the cathode 20 supported from behind by the current collector 72 has been described as an example, but the present invention is not limited to this embodiment. For example, when the cathode 20 is a rigid porous electrode, the alkaline water electrolyzer may be configured such that the cathode 20 is directly supported from the back of the cathode 20 by the conductive ribs 62 without the current collector 72.
In the above description of the present invention, the alkaline water electrolytic cell 5000 and the alkaline water electrolytic cell 6000 in the form of the flexible porous plate in which the 1 st electrode is pressed against the 2 nd electrode by the 1 st elastic body having conductivity and the 2 nd electrode is supported from behind by the conductive rib have been described as an example, but the present invention is not limited to this form. For example, the alkaline water electrolyzer may be configured such that the 1 st electrode, which is a flexible porous plate, is pressed toward the 2 nd electrode by the 1 st elastic body having conductivity, and the 2 nd electrode is pressed toward the 1 st electrode by the 2 nd elastic body having conductivity. Fig. 11 is a sectional view schematically illustrating an alkaline water electrolyzer 7000 (hereinafter also referred to as "alkaline water electrolyzer 7000") according to another embodiment as described above. In fig. 11, the same reference numerals as those in fig. 2 to 10 are given to elements already shown in fig. 2 to 10, and the description thereof is omitted. As shown in fig. 11, the electrolytic bath 7000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; and a composite body 300 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32. In cell 7000, composite 300 is configured as: anode 40 faces anode chamber a and cathode 20 faces cathode chamber C. In the electrolytic bath 7000, at least one of the cathode (1 st electrode) 20 and the anode (2 nd electrode) 40 is a porous plate having flexibility. Both the cathode (1 st electrode) 20 and the anode (2 nd electrode) 40 may be porous plates having flexibility, but preferably, one of the cathode (1 st electrode) 20 and the anode (2 nd electrode) 40 is a porous plate having flexibility and the other is a porous plate having rigidity. The electrolytic bath 7000 has: the cathode 20 includes a conductive rib 62 provided to protrude from an inner wall of the cathode side frame 52, a current collector 72 held by the conductive rib 62, and an elastic body (1 st elastic body) 82 held by the current collector 72 and having conductivity, and the cathode is pressed toward the anode 40 by the elastic body 82. The electrolytic bath 7000 also has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, and an elastic body (2 nd elastic body) 81 held by the current collector 71 and having conductivity, wherein the anode 40 is pressed toward the cathode 20 by the elastic body 81.
The alkaline water electrolyzer 7000 of the above-described embodiment can also obtain the same effects as those of the electrolyzer 5000 described above. Moreover, since the diaphragm 10 receives the pressure of the elastic body from both the anode side and the cathode side, the deformation of the diaphragm 10 in the vicinity of the gasket 30 is easily reduced.
Fig. 12 is a sectional view schematically illustrating an alkaline water electrolyzer 8000 (hereinafter also referred to as "electrolyzer 8000") according to still another embodiment. In fig. 12, the same reference numerals as those in fig. 2 to 11 are given to elements already shown in fig. 2 to 11, and the description thereof is omitted. As shown in fig. 12, the electrolytic bath 8000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; and a composite body 300 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32. In the electrolytic cell 8000, the composite 300 is arranged: anode 40 faces anode chamber a and cathode 20 faces cathode chamber C. In the electrolytic bath 8000, the cathode (1 st electrode) 20 is a flexible porous plate (1 st porous plate). The anode (2 nd electrode) 40 may be a rigid porous plate or a flexible porous plate (2 nd porous plate), but is preferably a flexible porous plate. The electrolytic bath 8000 has: the cathode 20 includes a conductive rib 62 provided to protrude from an inner wall of the cathode side frame 52, a current collector 72 held by the conductive rib 62, and an elastic body (1 st elastic body) 82 held by the current collector 72 and having conductivity, and the cathode is pressed toward the anode 40 by the elastic body 82. The electrolytic bath 8000 further has: a conductive rib 61 provided to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, an elastic body (2 nd elastic body) 81 held by the current collector 71 and having conductivity, and a rigid current collector 91 arranged between the elastic body 81 and the anode 40 and having conductivity, wherein the anode 40 is pressed toward the cathode 20 by the elastic body 81 via the rigid current collector 91. That is, in the electrolytic cell 8000, the rigid current collector 91 is disposed so that the 2 nd electrode (anode) 40 is sandwiched between the rigid current collector 91 and the separator 10, and the 2 nd electrode (anode) 40 is supported by the rigid current collector 91.
In the electrolytic cell 8000, since the elastic body 81 presses the anode 40 via the rigid current collector 91 (that is, the anode 40 is supported from the back by the rigid current collector 91), even when both the anode 40 and the cathode 20 are flexible, the pressure when pressing both the electrodes against the separator 10 can be made more uniform over the entire surfaces of both the electrodes, and thus the current density can be made more uniform. The effects described above with respect to the electrolytic bath 7000 can be obtained similarly.
In the above description of the present invention, the alkaline water electrolyzer 8000 of the type in which the conductive elastic body 81 presses the anode 40 toward the cathode 20 via the rigid current collector 91 has been described as an example, but the present invention is not limited to this type. For example, an alkaline water electrolyzer of a type in which a conductive elastomer presses a cathode toward an anode via a rigid current collector can also be used. Fig. 13 is a sectional view schematically illustrating an alkaline water electrolyzer 9000 (hereinafter also referred to as "electrolyzer 9000") according to another embodiment as described above. In fig. 13, the same reference numerals as those in fig. 2 to 12 are given to elements already shown in fig. 2 to 12, and the description thereof is omitted. As shown in fig. 13, an electrolytic cell 9000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; and a composite body 300 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32. In electrolytic cell 9000, composite 300 is arranged: anode 40 faces anode chamber a and cathode 20 faces cathode chamber C. In the electrolytic cell 9000, the anode (1 st electrode) 40 is a flexible porous plate (1 st porous plate). The cathode (2 nd electrode) 20 may be a rigid porous plate or a flexible porous plate (2 nd porous plate), but is preferably a flexible porous plate. The electrolytic cell 9000 has: a conductive rib 61 provided so as to protrude from the inner wall of the anode side frame 51, a current collector 71 held by the conductive rib 61, and an elastic body (1 st elastic body) 81 held by the current collector 71 and having conductivity, wherein the anode 40 is pressed toward the cathode 20 by the elastic body 81. The electrolytic cell 9000 further has: the cathode 20 includes a conductive rib 62 provided to protrude from an inner wall of the cathode side frame 52, a current collector 72 held by the conductive rib 62, an elastic body (2 nd elastic body) 82 held by the current collector 72 and having conductivity, and a rigid current collector 91 arranged between the elastic body 82 and the cathode 20 and having conductivity, and the cathode 20 is pressed toward the anode 40 by the elastic body 82 via the rigid current collector 91. That is, in the electrolytic cell 9000, the rigid current collector 91 is disposed so that the 2 nd electrode (cathode) 20 is sandwiched between the rigid current collector 91 and the separator 10, and the 2 nd electrode (cathode) 20 is supported by the rigid current collector 91.
The alkaline water electrolyzer 9000 of the above-described embodiment can also provide the same effects as those of the electrolyzer 8000 described above. That is, with the electrolytic cell 9000, the elastic body 82 presses the cathode 20 via the rigid current collector 91 (that is, the cathode 20 is supported from the back by the rigid current collector 91), and therefore, even when both the anode 40 and the cathode 20 have flexibility, the pressure when pressing both the electrodes against the separator 10 can be made more uniform over the entire surfaces of both the electrodes, and thus the current density can be made more uniform. The effects described above with respect to the electrolytic bath 7000 can be obtained similarly.
In the above description of the present invention, the alkaline water electrolysis cell 1000 to the alkaline water electrolysis cell 9000 in the form of the anode chamber having the conductive rib 61 and the cathode chamber having the conductive rib 62 have been described as an example, but the present invention is not limited to this form. For example, the alkaline water electrolyzer may be configured such that one or both of the anode chamber and the cathode chamber do not have the conductive rib. Fig. 14 is a sectional view schematically illustrating an alkaline water electrolyzer 10000 (hereinafter also referred to as "electrolyzer 10000") according to another embodiment as described above. In fig. 14, the same reference numerals as those in fig. 2 to 13 are assigned to elements already shown in fig. 2 to 13, and the description thereof is omitted. As shown in fig. 14, an electrolytic cell 10000 has: an anode-side frame 51 having conductivity and defining an anode chamber a; a cathode-side frame 52 having conductivity and defining a cathode chamber C; and a composite body 300 sandwiched between the anode-side frame 51 and the cathode-side frame 52 such that the anode-side frame 51 is in contact with the 1 st surface 31 and the cathode-side frame 52 is in contact with the 2 nd surface 32. In the electrolytic cell 10000, the composite 300 is configured as: anode 40 faces anode chamber a and cathode 20 faces cathode chamber C. In the electrolytic cell 10000, at least one of the cathode (1 st electrode) 20 and the anode (2 nd electrode) 40 is a porous plate having flexibility. Both the cathode (1 st electrode) 20 and the anode (2 nd electrode) 40 may be porous plates having flexibility, but preferably, one of the cathode (1 st electrode) 20 and the anode (2 nd electrode) 40 is a porous plate having flexibility and the other is a porous plate having rigidity. The electrolytic cell 10000 includes an elastic body (1 st elastic body) 82, the elastic body 82 is disposed between the conductive rear partition 52a of the cathode side frame 52 and the cathode 20, and is disposed in direct contact with the rear partition 52a and the cathode 20, the elastic body 82 has conductivity, and the cathode 20 is pressed toward the anode 40 by the elastic body 82. The electrolytic cell 10000 further includes an elastic body (2 nd elastic body) 81, the elastic body 81 is disposed between the conductive back partition 51a of the anode side frame 51 and the anode 40, and is disposed in direct contact with the back partition 51a and the anode 40, the elastic body 81 has conductivity, and the anode 40 is pressed toward the cathode 20 by the elastic body 81.
The alkaline water electrolyzer 10000 of the above-described embodiment can also provide the same effects as those of the electrolyzer 7000 described above. In addition, in the electrolytic cell 10000, since the anode chamber a and the cathode chamber C do not have the conductive rib, the thickness of each unit electrolytic cell can be reduced, and thus the electrolytic cell can be downsized, and the gas yield per floor area can be improved. Further, since either or both of the anode chamber and the cathode chamber do not have the conductive rib, the material constituting the electrolytic cell and the man-hours required for manufacturing the electrolytic cell can be reduced.
Examples
The present invention will be described in more detail below based on examples and comparative examples. However, the present invention is not limited to these examples.
Examples
The alkaline water electrolytic cell 5000 (FIG. 9) having the membrane-electrode-gasket assembly 300 (FIG. 4) for alkaline water electrolysis included in the present invention was used, and the area of current passage was 0.5dm 2 The electrolyte temperature was 80 ℃, the KOH concentration was 25 mass%, and the current density was 60A/dm 2 The electrolysis of alkaline water was carried out under the conditions of (1) and the required voltage was measured.
Comparative example
The electrolysis of alkaline water was performed under the same conditions as in example 1 except that a zero-gap type electrolytic cell having a conventional structure (see fig. 1) in which the gasket and the electrode were not integrated was used instead of the alkaline water electrolytic cell used in the example, and the required voltage was measured.
Evaluation results
With the alkaline water electrolytic cell used in the example, the voltage required for electrolysis was reduced by 1.5% compared to the conventional zero-gap type electrolytic cell used in the comparative example, although the energization area and the current value were the same. This means that: by increasing the area of the zero gap (direct contact between the electrode and the separator), the current can be made to flow more uniformly over the entire current-carrying surface. Further, while crystal deposition due to electrolyte leakage was observed around the gasket after one day from the start of electrolysis in the electrolytic cell of the comparative example, crystal deposition due to electrolyte leakage was not observed even when the electrolytic cell used in the example was continuously electrolyzed for two weeks.
Description of the reference numerals
10. A membrane (having ion permeability); 11. a 1 st membrane surface; 12. a 2 nd membrane surface; 20. 21, a cathode; 30. a gasket; 31. the 1 st surface; 32. the 2 nd surface; 33. a slot; 34. part 1; 35. part 2; 36. a connecting portion; 40. 41, 42, an anode; 100. 200, 300, membrane-electrode-gasket complex for alkaline water electrolysis; 51. an anode-side frame body; 52. a cathode-side frame body; 51a, 52a, a (electrically conductive) rear partition wall; 51b, 52b, flange parts; 61. 62, a conductive rib; 71. 72, a current collector; 81. 82, an elastic body having conductivity; 91. a rigid current collector; 900. existing zero-gap electrolyzers; 910. a pole chamber unit; 911. a partition wall having conductivity; 912. a flange portion; 913. 914, ribs having electrical conductivity; 920. a membrane having ion permeability; 930. a gasket; 940. an anode; 950. a current collector; 960. an elastomer having conductivity; 970. a cathode; 1000. 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, alkaline water electrolyzer; A. an anode chamber; C. a cathode chamber.

Claims (17)

1. An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame body which defines an anode chamber;
a cathode-side frame body defining a cathode chamber;
a membrane-electrode-gasket complex sandwiched between the anode-side frame and the cathode-side frame,
the membrane-electrode-gasket composite comprises a separator, a No. 1 electrode and a gasket,
the membrane has a 1 st membrane face and a 2 nd membrane face,
the 1 st electrode is arranged to overlap with the 1 st membrane face of the separator,
the spacer has an electrical insulating property and holds the separator and the 1 st electrode together,
the gasket having a 1 st face, a 2 nd face, a slot portion, a 1 st portion and a 2 nd portion, and a connecting portion,
the 1 st surface is connected to an anode side frame,
the 2 nd surface is in contact with the cathode side frame,
the slit portion opens toward the inner peripheral side and accommodates the entire peripheral edge portion of the separator and the entire peripheral edge portion of the 1 st electrode,
the 1 st portion and the 2 nd portion are opposed to each other with the slit therebetween in a direction intersecting the 1 st surface and the 2 nd surface, the 1 st portion having the 1 st surface, the 2 nd portion having the 2 nd surface,
a connecting portion provided on an outer peripheral side of the slit portion, integrally connecting the 1 st portion and the 2 nd portion, and sealing an outer peripheral end of the slit portion,
the entire peripheral edge portion of the separator and the entire peripheral edge portion of the 1 st electrode accommodated in the slit portion are sandwiched integrally by the 1 st portion and the 2 nd portion; and
a 2 nd electrode which is not held by the spacer but is arranged so as to be in contact with the 2 nd film surface of the separator,
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the anode chamber, the 2 nd membrane face of the diaphragm faces the cathode chamber,
the 1 st electrode is an anode for generating oxygen,
the No. 2 electrode is a cathode for producing hydrogen.
2. The alkaline water electrolyzer of claim 1 wherein,
the 1 st electrode is a 1 st porous plate having flexibility.
3. An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame defining a cathode chamber;
a membrane-electrode-gasket complex sandwiched between the anode-side frame and the cathode-side frame,
the membrane-electrode-gasket composite comprises a separator, a No. 1 electrode and a gasket,
the membrane has a 1 st membrane face and a 2 nd membrane face,
the 1 st electrode is arranged to overlap with the 1 st membrane face of the separator,
the spacer has an electrical insulating property and holds the separator and the 1 st electrode together,
the gasket having a 1 st face, a 2 nd face, a slot portion, a 1 st portion and a 2 nd portion, and a connecting portion,
the 1 st surface is connected to an anode side frame,
the 2 nd surface is in contact with the cathode side frame,
the slit portion opens toward the inner peripheral side and accommodates the entire peripheral edge portion of the separator and the entire peripheral edge portion of the 1 st electrode,
the 1 st portion and the 2 nd portion are opposed to each other with the slit therebetween in a direction intersecting the 1 st surface and the 2 nd surface, the 1 st portion having the 1 st surface, the 2 nd portion having the 2 nd surface,
a connecting portion provided on an outer peripheral side of the slit portion, integrally connecting the 1 st portion and the 2 nd portion, and sealing an outer peripheral end of the slit portion,
the whole peripheral edge part of the diaphragm and the whole peripheral edge part of the 1 st electrode which are contained in the slot part are clamped into a whole by the 1 st part and the 2 nd part; and
a 2 nd electrode which is not held by the spacer but is arranged so as to be in contact with the 2 nd film surface of the separator,
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the cathode chamber, the 2 nd membrane face of the diaphragm faces the anode chamber,
the No. 1 electrode is a cathode for producing hydrogen,
the 2 nd electrode is an anode for generating oxygen.
4. The alkaline water electrolyzer of claim 3 wherein,
the 1 st electrode is a 1 st porous plate having flexibility.
5. An alkaline water electrolyzer, in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame body defining a cathode chamber; and
a membrane-electrode-gasket complex sandwiched between the anode-side frame and the cathode-side frame,
the membrane-electrode-gasket composite has:
a membrane having a 1 st membrane face and a 2 nd membrane face;
a 1 st electrode arranged to overlap a 1 st membrane face of the separator;
a 2 nd electrode arranged to overlap the 2 nd membrane face of the separator; and
a spacer having an electrical insulation property and holding the separator, the 1 st electrode, and the 2 nd electrode as a single body,
the gasket has:
a 1 st surface which is in contact with the anode side frame;
a 2 nd surface which is in contact with the cathode side frame;
a slit portion that is open toward an inner peripheral side and that accommodates an entire peripheral edge portion of the separator, an entire peripheral edge portion of the 1 st electrode, and an entire peripheral edge portion of the 2 nd electrode;
a 1 st portion and a 2 nd portion which are opposed to each other with the slit therebetween in a direction intersecting the 1 st surface and the 2 nd surface, the 1 st portion having the 1 st surface, the 2 nd portion having the 2 nd surface; and
a connecting portion provided on an outer peripheral side of the slit portion, integrally connecting the 1 st portion and the 2 nd portion, and sealing an outer peripheral end of the slit portion,
the entire peripheral edge portion of the separator, the entire peripheral edge portion of the 1 st electrode, and the entire peripheral edge portion of the 2 nd electrode accommodated in the slit portion are integrally sandwiched by the 1 st portion and the 2 nd portion,
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the anode chamber, the 2 nd membrane face of the diaphragm faces the cathode chamber,
the 1 st electrode is an anode for generating oxygen,
the No. 2 electrode is a cathode for producing hydrogen.
6. The alkaline water electrolyzer of claim 5 wherein,
the 1 st electrode is a 1 st porous plate having flexibility.
7. The alkaline water electrolyzer of claim 5 or 6, wherein,
the 2 nd electrode is a rigid porous plate.
8. The alkaline water electrolyzer of claim 5 or 6 wherein,
the 2 nd electrode is a 2 nd porous plate having flexibility.
9. An alkaline water electrolysis cell in which,
the alkaline water electrolyzer comprises:
an anode-side frame defining an anode chamber;
a cathode-side frame body defining a cathode chamber; and
a membrane-electrode-gasket complex sandwiched between the anode-side frame and the cathode-side frame,
the membrane-electrode-gasket composite has:
a separator having a 1 st membrane face and a 2 nd membrane face;
a 1 st electrode arranged to overlap a 1 st membrane face of the separator;
a 2 nd electrode arranged to overlap the 2 nd membrane face of the separator; and
a spacer having an electrical insulating property and holding the separator, the 1 st electrode, and the 2 nd electrode as a single body,
the gasket has:
a 1 st surface which is in contact with the anode side frame;
a 2 nd surface which is in contact with the cathode side frame;
a slit portion that is open toward an inner peripheral side and that accommodates an entire peripheral edge portion of the separator, an entire peripheral edge portion of the 1 st electrode, and an entire peripheral edge portion of the 2 nd electrode;
a 1 st portion and a 2 nd portion which are opposed to each other with the slit therebetween in a direction intersecting the 1 st surface and the 2 nd surface, the 1 st portion having the 1 st surface, the 2 nd portion having the 2 nd surface; and
a connecting portion provided on an outer peripheral side of the slit portion, integrally connecting the 1 st portion and the 2 nd portion, and sealing an outer peripheral end of the slit portion,
the entire peripheral edge portion of the separator, the entire peripheral edge portion of the 1 st electrode, and the entire peripheral edge portion of the 2 nd electrode accommodated in the slit portion are integrally sandwiched by the 1 st portion and the 2 nd portion,
the membrane-electrode-gasket composite is configured to: the 1 st membrane face of the diaphragm faces the cathode chamber, the 2 nd membrane face of the diaphragm faces the anode chamber,
the No. 1 electrode is a cathode for producing hydrogen,
the 2 nd electrode is an anode for generating oxygen.
10. The alkaline water electrolyzer of claim 9 wherein,
the 1 st electrode is a 1 st porous plate having flexibility.
11. The alkaline water electrolyzer of claim 9 or 10 wherein,
the 2 nd electrode is a rigid porous plate.
12. The alkaline water electrolyzer of claim 9 or 10 wherein,
the 2 nd electrode is a 2 nd porous plate having flexibility.
13. The alkaline water electrolyzer of claim 1, 3, 5 or 9 wherein,
the 1 st electrode is a 1 st porous plate with flexibility,
the 1 st electrode is pressed toward the 2 nd electrode by a 1 st elastic body having conductivity.
14. The alkaline water electrolyzer of claim 13 wherein,
the 2 nd electrode is a rigid porous plate.
15. The alkaline water electrolyzer of claim 14 wherein,
the 2 nd electrode is pressed toward the 1 st electrode by a 2 nd elastic body having conductivity.
16. The alkaline water electrolyzer of claim 13 wherein,
the 2 nd electrode is a 2 nd porous plate with flexibility,
the 2 nd electrode is pressed toward the 1 st electrode by a 2 nd elastic body having conductivity.
17. The alkaline water electrolyzer of claim 13 wherein,
the alkaline water electrolyzer further comprises a rigid current collector which is disposed in contact with the 2 nd electrode and has conductivity,
the rigid current collector is disposed such that the 2 nd electrode is sandwiched between the rigid current collector and the separator,
the 2 nd electrode is a 2 nd porous plate with flexibility,
the 2 nd electrode is supported by the rigid body current collector.
CN201880078363.3A 2017-12-05 2018-11-30 Membrane-electrode-gasket composite for alkaline water electrolysis Active CN111433391B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017233704 2017-12-05
JP2017-233704 2017-12-05
PCT/JP2018/044311 WO2019111832A1 (en) 2017-12-05 2018-11-30 Alkali water electrolysis membrane - electrode - gasket composite

Publications (2)

Publication Number Publication Date
CN111433391A CN111433391A (en) 2020-07-17
CN111433391B true CN111433391B (en) 2022-08-30

Family

ID=66751494

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201880078363.3A Active CN111433391B (en) 2017-12-05 2018-11-30 Membrane-electrode-gasket composite for alkaline water electrolysis

Country Status (7)

Country Link
US (2) US20200340130A1 (en)
EP (1) EP3722463A4 (en)
JP (1) JP6559383B1 (en)
KR (2) KR20240068756A (en)
CN (1) CN111433391B (en)
TW (1) TWI770320B (en)
WO (1) WO2019111832A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4001471A4 (en) * 2019-07-19 2023-09-13 De Nora Permelec Ltd Gasket for electrolysis vessels, and electrolysis vessel using same
WO2021085334A1 (en) * 2019-10-31 2021-05-06 株式会社トクヤマ Elastic mat for alkaline water electrolysis cells
JPWO2021200376A1 (en) * 2020-03-31 2021-10-07
AU2021249587A1 (en) 2020-03-31 2022-09-15 Tokuyama Corporation Electrolytic element for alkaline water electrolysis, and alkaline water electrolysis vessel
US20230183876A1 (en) * 2020-04-10 2023-06-15 Idemitsu Kosan Co.,Ltd. Li ION RECOVERY MEMBER AND Li RECOVERY DEVICE USING SAME
JP7353494B2 (en) * 2020-06-15 2023-09-29 旭化成株式会社 Multipolar zero gap electrolyzer for water electrolysis
CN114807992B (en) * 2021-01-18 2024-07-05 庄政霖 Two-tank type electrolytic tank
KR20240063863A (en) 2021-10-01 2024-05-10 가부시끼가이샤 도꾸야마 electrolyzer
US20230243047A1 (en) * 2022-02-01 2023-08-03 Verdagy, Inc. Electrolyzer cell and methods of using and manufacturing the same
EP4234761A1 (en) * 2022-02-25 2023-08-30 thyssenkrupp nucera AG & Co. KGaA Electrolysis cell
WO2023234335A1 (en) * 2022-06-03 2023-12-07 三菱重工業株式会社 Electrolytic cell and electrolyzer
CN117926293A (en) * 2023-03-21 2024-04-26 国家能源投资集团有限责任公司 Alkaline membrane electrode type electrolytic tank for producing hydrogen by alkaline water electrolysis and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205803608U (en) * 2016-02-26 2016-12-14 派新（上海）能源技术有限公司 A kind of alkaline water electrolytic cell of high current density

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3434348B2 (en) * 1994-05-17 2003-08-04 ミズ株式会社 Electrolyzed water generator
JP3480988B2 (en) * 1994-07-01 2003-12-22 ジャパンゴアテックス株式会社 Sealing and reinforcing membrane material for fluoropolymer solid electrolyte membrane, fluoropolymer solid electrolyte membrane using the same, and plating method thereof
US6254741B1 (en) * 1999-08-05 2001-07-03 Stuart Energy Systems Corporation Electrolytic cells of improved fluid sealability
JP3772055B2 (en) 1999-08-30 2006-05-10 株式会社トクヤマ Electrolytic cell
KR100405163B1 (en) 2001-05-08 2003-11-12 키펙스솔루션스 주식회사 Electrolyser
JP4453973B2 (en) 2002-11-27 2010-04-21 旭化成ケミカルズ株式会社 Bipolar zero-gap electrolysis cell
US20130140171A1 (en) * 2008-07-15 2013-06-06 Next Hydrogen Corporation Electrolyser module
CN102459709A (en) * 2009-05-26 2012-05-16 氯工程公司 Gas diffusion electrode-equipped ion-exchange membrane electrolytic cell
JP2011040359A (en) * 2009-07-17 2011-02-24 Nok Corp Fuel cell gas diffusion layer integrated gasket
JP5632773B2 (en) 2011-02-28 2014-11-26 株式会社トクヤマ Electrolytic cell manufacturing method
EA032882B1 (en) 2011-07-20 2019-07-31 Нью Нел Хюдроген Ас Electrolyser frame concept, method and use
DK2862960T3 (en) 2012-06-18 2020-03-23 Asahi Chemical Ind BIPOLAR ALKALIC WATER ELECTROLYSIS UNIT
WO2014178317A1 (en) 2013-04-30 2014-11-06 旭化成株式会社 Gasket and electrolyser
JP6324056B2 (en) 2013-12-19 2018-05-16 旭化成株式会社 Diaphragm for alkaline water electrolysis and alkaline water electrolyzer using the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205803608U (en) * 2016-02-26 2016-12-14 派新（上海）能源技术有限公司 A kind of alkaline water electrolytic cell of high current density

Also Published As

Publication number Publication date
US20200340130A1 (en) 2020-10-29
KR20200095533A (en) 2020-08-10
TWI770320B (en) 2022-07-11
WO2019111832A1 (en) 2019-06-13
KR20240068756A (en) 2024-05-17
EP3722463A4 (en) 2021-08-18
US20230143558A1 (en) 2023-05-11
JPWO2019111832A1 (en) 2019-12-12
CN111433391A (en) 2020-07-17
KR102688829B1 (en) 2024-07-29
EP3722463A1 (en) 2020-10-14
JP6559383B1 (en) 2019-08-14
TW201937000A (en) 2019-09-16

Similar Documents

Publication Publication Date Title
CN111433391B (en) Membrane-electrode-gasket composite for alkaline water electrolysis
CN111699280B (en) Electrolytic cell for alkaline water electrolysis
EP3778993A1 (en) Diaphragm-gasket-protective member complex, electrolysis element, and electrolysis vessel
EP4053308A1 (en) Elastic mat for alkaline water electrolysis cells
US20230088736A1 (en) Electrolysis vessel
JP6306879B2 (en) Manifold unit and electrolytic cell
CN115335551A (en) Alkaline water electrolytic bath
JP7330422B1 (en) Electrolyzer for alkaline water electrolysis
WO2024166685A1 (en) Electrolytic element and alkaline water electrolytic cell
WO2024128196A1 (en) Diaphragm element, electrolytic cell and gas production method
JP2023062408A (en) electrolytic cell

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant